A TIME-OF-FLIGHT ELECTRON VELOCITY SPECTROMETER

Abstract

A velocity selector is described which is designed for measurement of the total collision cross section of electrons in the energy region below one volt. The system determines the distributions of times of flight of single electrons over a measured path at selected pressures of a specimen gas. The electrons are generated by repetitive illumination of a photo-emitter by a spark gap, pass over a shielded drift path, enter an accelerating field, and impinge on an electron multiplier. Electronic equipment and data reduction for analysis of time-of-flight and amplitude distributions of electron counts are described; data illustrative of performance are presented, including typical transmission measurements in helium and argon which extend to 100 millivolts. Applications and extensions of the technique are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1966
Accession Number
AD0641394

Entities

People

  • G. C. Baldwin
  • S. I. Friedman

Organizations

  • General Electric

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Data Processing
  • Data Reduction
  • Detection
  • Detectors
  • Electron Emission
  • Electron Energy
  • Electron Multipliers
  • Emitters
  • Geometry
  • Information Processing
  • Magnetic Fields
  • Measurement
  • Photoelectrons
  • Photoexcitation
  • Secondary Emission
  • Spark Gaps

Fields of Study

  • Physics

Readers

  • Aerospace Test and Evaluation
  • Molecular Photonics/Laser Physics
  • Plasma Physics.

Technology Areas

  • Microelectronics